Lake ecosystem responses to catchment disturbance and airborne pollution: an 800-year perspective in southern Sweden

Bragée, Petra; Choudhary, Preetam; Routh, Joyanto; Boyle, John; Hammarlund, Dan

doi:10.1007/s10933-013-9746-2

Cited by 33 publications

(21 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2,600 years at Fiolen. The age-depth models as published in Fredh et al (2013) and Bragée et al (2013a) , were collected at 0.5 cm intervals and treated by the acetolysis method (Berglund and Ralska-Jasiewiczowa 1986). The pollen grains were counted and identified for each level using identification keys (Punt et al 1976(Punt et al -2009Beug 2004) and the reference collection at the Department of Geology, Lund University.…”

Section: Correlation and Chronologymentioning

confidence: 99%

See 1 more Smart Citation

Two hundred years of land-use change in the South Swedish Uplands: comparison of historical map-based estimates with a pollen-based reconstruction using the landscape reconstruction algorithm

Mazier

Broström

Bragée

et al. 2015

Veget Hist Archaeobot

Self Cite

View full text Add to dashboard Cite

Section: Correlation and Chronologymentioning

confidence: 99%

“…This study selects the most reliable dates possible for establishing the age-depth model at each lake (Fredh et al 2013;Bragée et al 2013a). For the last 200 years, the uncertainty envelopes at the 95.4 % confidence level are 2-119 years for Å bodasjön, 4-156 years for Lindhultsgöl, and 1-260 years for Fiolen.…”

Section: Pollen-based Approachmentioning

confidence: 99%

Two hundred years of land-use change in the South Swedish Uplands: comparison of historical map-based estimates with a pollen-based reconstruction using the landscape reconstruction algorithm

Mazier

Broström

Bragée

et al. 2015

Veget Hist Archaeobot

Self Cite

View full text Add to dashboard Cite

“…The age-depth model for Åbodasjön was based on three terrestrial plant macrofossil 14 C dates, a CRS model (based on 25 210 Pb samples) and four pollution marker horizons. The age-depth model for Lindhultsgöl was based on two terrestrial macrofossil 14 C dates, a CRS model (based on 20 210 Pb samples) and five pollution marker horizons (Bragée et al, 2013). Four radiocarbon dates obtained on bulk sediment samples were rejected for Åbodasjön, and three bulk sediment dates were not used for the Lindhultsgöl age-depth model.…”

Section: Datingmentioning

confidence: 99%

The effect of local land-use changes on floristic diversity during the past 1000 years in southern Sweden

et al. 2016

Self Cite

View full text Add to dashboard Cite

The relationship between land-use and floristic diversity in the landscape, for the last millennia, is analysed from two small lakes in southern Sweden. Pollen analysis and the Local Vegetation Estimates (LOVE) model are used to quantify land-cover at local scales with 100-year time windows. Floristic richness is estimated using palynological richness, and we introduce LOVE-based evenness as a proxy for floristic evenness on a local scale based on the LOVE output. The results reveal a dynamic land-use pattern, with agricultural expansion during the 13th century, a partly abandoned landscape around AD 1400, re-establishment during the 15th-17th centuries and a transition from traditional to modern land-use during the 20th century. We suggest that the more heterogeneous landscape and the more dynamic land-use during the 13th-19th centuries were of substantial importance for achieving the high floristic diversity that characterises the traditional landscape. Pollen-based studies of this type are helpful in identifying landscape characteristics and landuse practices that are important for floristic diversity and may therefore guide the development of ecosystem management strategies aiming at mitigating the ongoing loss of species seen in the landscape of southern Sweden and many other regions worldwide.

show abstract

“…A few studies have complemented these parameters with an OM characterization using "Rock-Eval" pyrolysis [Wohlfarth et al, 2004] or infrared spectroscopy [Rosén and Hammarlund, 2007;Rosén et al, 2011;Michelutti et al, 2010;Bragée et al, 2015]. In other studies, mass spectrometry-based methods, requiring fastidious, time-consuming, and compound-specific extractions, have been used to identify a limited number of organic molecules (biomarkers), such as lignin oligomers for the identification of terrestrially derived OM [Moingt et al, 2014;Chmiel et al, 2015], and n-alkanes for estimation of terrestrial and aquatic OM source inputs [Bragée et al, 2013].…”

Section: Introductionmentioning

confidence: 99%

Investigating molecular changes in organic matter composition in two Holocene lake‐sediment records from central Sweden using pyrolysis‐GC/MS

et al. 2017

View full text Add to dashboard Cite

Organic matter (OM) is a key component of lake sediments, affecting carbon, nutrient, and trace metal cycling at local and global scales. Yet little is known about long‐term (millennial) changes in OM composition due to the inherent chemical complexity arising from multiple OM sources and from secondary transformations. In this study we explore how the molecular composition of OM changes throughout the Holocene in two adjacent boreal lakes in central Sweden and compare molecular‐level information with conventional OM variables, including total carbon, total nitrogen, C:N ratios, δ13C, and δ15N. To characterize the molecular OM composition, we employed a new method based on pyrolysis‐gas chromatography/mass spectrometry (Py‐GC/MS), which yields semiquantitative data on >100 organic compounds of different origin and degradation status. We identify large changes in OM composition after deglaciation (circa 8500 ± 500 B.C.), associated with early landscape development, and during the most recent 40–50 years, driven by degradation processes. With molecular‐level information we can also distinguish between natural landscape development and human catchment disturbance during the last 1700 years. Our study demonstrates that characterization of the molecular OM composition by the high‐throughput Py‐GC/MS method is an efficient complement to conventional OM variables for identification and understanding of past OM dynamics in lake‐sediment records. Holocene changes observed for pyrolytic compounds and compound classes known for having different reactivity indicate the need for further paleo‐reconstruction of the molecular OM composition to better understand both past and future OM dynamics and associated environmental changes.

show abstract

Lake ecosystem responses to catchment disturbance and airborne pollution: an 800-year perspective in southern Sweden

Cited by 33 publications

References 44 publications

Two hundred years of land-use change in the South Swedish Uplands: comparison of historical map-based estimates with a pollen-based reconstruction using the landscape reconstruction algorithm

Two hundred years of land-use change in the South Swedish Uplands: comparison of historical map-based estimates with a pollen-based reconstruction using the landscape reconstruction algorithm

The effect of local land-use changes on floristic diversity during the past 1000 years in southern Sweden

Investigating molecular changes in organic matter composition in two Holocene lake‐sediment records from central Sweden using pyrolysis‐GC/MS

Contact Info

Product

Resources

About